Tag biofilter

German researcher believes that floating fish feces would help recirculating aquaculture systems more efficiently remove suspended solids. 

Biological filters are essential parts of recirculating aquaculture systems that transform toxic fish compounds such as ammonium and nitrite into less-harmful nitrate. The authors tested the convenience and efficiency of three methods for the initial inoculation of aerobic biofilters. 

Controlling total ammonia-nitrogen (TAN) concentrations is the primary concern when sizing a biofilter for use in a recirculating aquaculture system. Sizing decisions are best based on previous experience with a given biofilter media in a specific biofilter configuration. 

To start a biofilter together with a source of nitrifying bacteria, you must provide the conditions that will encourage the growth of the bacteria. The basic process requires initial preparation of water chemistry, adjustment of alkalinity to support bacterial growth and the addition of ammonia. 

Biological filtration is one of the critical required unit processes in recirculating aquaculture systems. Non-corrosive filter media with large amounts of surface provides area for nitrifying bacteria cells to colonize. 

Despite their relatively small footprint, low-space bioreactors deliver sustainable and cost-effective biological wastewater treatment, particularly in recirculating aquaculture systems, where ammonia removal is critical. 

Hydrogen peroxide is a candidate for water treatment in aquaculture systems for it has antimicrobial effects and easily degrades to harmless byproducts. 

One way to jump start biofilter operation is by adding sugar, which can provide sufficient organic carbon to neutralize the ammonia-nitrogen produced. 

Authors found the biofilter unit portion of the Intensive Bioproduction Korean system originally developed for nitrification can remove suspended solids. 

In a recent study, the authors set up a series of temperature-controlled tanks to determine the effects of temperature variation on biofilter performance. 

A simple evaluation process can characterize commercial biofilter performance as a function of flow rate and ammonia-nitrogen concentration. 

Although widely used in aquaculture applications, some synthetic polymer liners can release toxic substances into culture water and affect animal health.